Sianna is a distinctive girls' name in England & Wales, ranking #1083 in 2009 with 29 recorded births. The name reached its all-time peak in 2013 with 43 births ranking #865. Since 1996, the popularity has increased by 383.3%. In 2009, approximately 1 in every 10,806 girls born was named Sianna. FALLING Recent data shows the name is currently falling.